| PEMFC水含量的在线表征及暂态过程分析 |
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| 引用本文： | 郝立星,俞红梅,侯俊波,宋微,邵志刚,衣宝廉.PEMFC水含量的在线表征及暂态过程分析[J].电源技术,2009,33(4). |
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| 作者姓名： | 郝立星 俞红梅 侯俊波 宋微 邵志刚 衣宝廉 |
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| 作者单位： | 1. 中国科学院,大连化学物理研究所,燃料电池系统与工程实验室,辽宁,大连,116023;中国科学院,研究生院,北京,100039
2. 中国科学院,大连化学物理研究所,燃料电池系统与工程实验室,辽宁,大连,116023 |
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| 基金项目： | 国家“863”计划(2005AA501660,2007AA05Z123);;国家自然科学基金项目(20876154,20636060) |
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| 摘 要： | 采用电流线性扫描的方法,研究了暂态条件下PEMFC内氧还原反应(ORR)生成水量对电池性能的影响。利用微探针方法探讨了不同操作条件下燃料电池中膜内水含量的变化情况。结合电化学交流阻抗技术以及相关经验公式,分析了暂态条件下燃料电池MEA内水的扩散特性。结果表明,暂态过程中电流与电压之间的响应在秒级以内,而燃料电池的高频阻抗(HFR)变化相对于电流存在着明显的滞后现象(对于Nafion212在15～20s)。此外,还就燃料电池的吹扫操作进行了探讨研究,并对实验结果进行了理论分析和解释。
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| 关 键 词： | 水传递 暂态过程 质子交换膜燃料电池（PEMFC） 交流阻抗谱（EIS） |
Transient analysis and in situ measurement of water content in PEMFC |
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| HAO Li-xing,YU Hong-mei,HOU Jun-bo,SONG Wei,SHAO Zhi-gang,YI Bao-lian.Transient analysis and in situ measurement of water content in PEMFC[J].Chinese Journal of Power Sources,2009,33(4). |
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| Authors: | HAO Li-xing YU Hong-mei HOU Jun-bo SONG Wei SHAO Zhi-gang YI Bao-lian |
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| Affiliation: | 1. Fuel Cell System and Engineering Laboratory;Dalian Institute of Chemical Physics;Chinese Academy of Sciences;Dalian Liaoning 116023;China;2. Graduate University of Chinese Academy of Sciences;Beijing 100039;China |
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| Abstract: | The influence of water generation due to the oxygen reduction reaction on the performance of PEMFC was investigated by a linear sweep method. The water content under different operating conditions was also obtained by using a micro- probe. The transient characteristics of water transport in the MEA were analyzed by Electrochemical Impedance Spectroscopy (EIS) technique. The results show that the transient response between the current and voltage is less than 1 s, but the transient response of the internal r... |
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| Keywords: | water transport transient process proton exchange membrane fuel cell (PEMFC) electrochemical impedance spectroscopy (EIS) |
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